Traditional solar regulators featuring PWM charging (pulse width modulation), operate by connecting the solar array directly to the battery bank. When the array is connected directly to the battery bank, the array output voltage is ‘pulled down’ to the battery voltage. This occurs because the batteries are a very large load for the limited current sourcing capability of a solar array.

The Morningstar EcoPulse is a pulse width modulation (PWM) solar charge controller within Morningstar’s Essential Series™ of products which provides essential off-grid battery regulation functions. This controller is easy to use, and designed for residential and leisure consumer applications.* Metered and non-metered versions of this product are available at 10, 20, and 30 amp charge ratings for 12 and 24 volt battery systems.